Malicious PDF — malware analysis report

Static analysis result for SHA-256 65641da898126025…

MALICIOUS

PDF

48.5 KB Created: 2020-04-11 01:21:41 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c52b0782b7ea57c77f773b167f07ce0b SHA-1: 18e92add6e5857f099cfdfd22579dbbae79d3a1a SHA-256: 65641da898126025298d6029b4b7deecc08732917386143b17d954018eba40c4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged as malicious by an ML classifier and contains a large number of external links, characteristic of a link farm or SEO scam. The document body, though partially corrupted, contains text suggesting it is related to 'Coloriage magique cp pdf' and mentions the wkhtmltopdf tool, indicating it was likely generated programmatically. The primary attack pattern involves directing users to a network of suspicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://bernardobellostudio.com/uploads/1/3/0/6/130639779/130639779.html#coloriage+magique+cp+pdf
    • http://jazzbandorlando.com/uploads/1/3/1/3/131398596/joroninenadopikunafu.pdf
    • http://shamraeffengineering.com/uploads/1/3/1/3/131382583/retufoladefigu-fitokarerosux-jenije.pdf
    • http://parquetematicotermales.com/uploads/1/3/0/9/130969932/97c7b2a95.pdf
    • http://myleokingspage.com/uploads/1/3/1/4/131406387/segixovosisexareso.pdf
    • http://wolverinmi.com/uploads/1/3/0/3/130379297/solowoniwewovavo.pdf
    • http://algarve4elements.com/uploads/1/3/0/7/130738909/e80fb0f157.pdf
    • http://mt-institute.com/uploads/1/3/0/5/130543598/bodeterosifazev-limunewavekasep-woliw-bujawupiforalax.pdf
    • http://paths2careers.com/uploads/1/3/0/8/130873922/rozerivagi-wizenelamilo-xoxidebijufeden.pdf
    • http://dog-creek.com/uploads/1/3/1/4/131438572/biwom.pdf
    • http://athleterealtyadvisors.com/uploads/1/3/0/6/130620642/puzedutij_dugejugapunix.pdf
    • http://blingbrilliance.com/uploads/1/3/0/6/130604982/jasigitapazopepufodo.pdf
    • http://snipthekeys.org/uploads/1/3/0/8/130813550/cdc0db912.pdf
    • http://roseandsmokyquartz.com/uploads/1/3/0/2/130289317/mofupu-fimojanixif-vewulu-domugijedim.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007caa.bin
4868d16796033f944ef501b9a323cfdc82fbca456d6f6afa092c415b2edeb1f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAA 9984 bytes
font_01_sfnt_off00009f7a.bin
b3affdfdfee497c2d3230853582529cf395d265bfdbb8cde7d84ae9c33602211
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F7A 16036 bytes